L.L.
Hello Cher - I'm married to a Chinese man who grew up in Hong Kong and moved here as a adult. The Chinese population in Minnesota is around 10,000 - slighltly less than the largest group which is Indian. The population is evenly spread among professionals working for big companies, restaurant operators and students and professors at the universities. U of M used to be the biggest and the only university that could admit students from mainland China in the 70's. At it's height, there were 8,000 students.
As far as mixed ethnicity goes there are no official statistics but one can tell from visits to Chinese restaurants and grocery stores that there are a lot more pure Chinese than mixed race kids.
Twin Cities has the first, and one of the only two, public school districts that provide Chinese immersion and Chinese language classes. The other city being Chicago. We have a 4 1/2 year old that will be attending kindergarden in the fall of 2010. So we are in the process of deciding which program to enroll him in. There are also two private schools that offer Chinese programs for an additional cost on top of the tuition.
I hope this information is helpful to you and your husband. Please feel free to contact me with any additional questions. Good luck, L. Lo